Specification1. ScopeThe cables are manufactured and tested
in accordance with IEC60502 Power Cables with Extruded
Insulation and their accessories for rated voltages from 1kV(Um1.2
kV) up to 30kV(Um 36kV). Whereas, Greatwall Cable can supply
XLPE insulation cables according to other recognized national and
international standards or customized specification.2.
Construction and Material1) ConductorConductors are normally class
2 of compacted cicular or circular standard conductors of copper or
aluminium. 2) Conductor ScreenAll cable of rated voltage above
1.8/3kV are supplied with conductor screening which is
non-mentallic and consists of either semi-conducting tape or
a layer of extruded semi-conducting compound,or
a combination of the two.3) InsulationInsulation is a
layer of extruded cross-linked
polyethylene(XLPE).4) Insulation Screen For cable at rated
voltage above 1.8/3kV ,insulation screening consists of a
non-metallic semi-conducting part in combination with a metallic
layer and consists of either semi-conducting tape or a layer of
extruded semi-conducting compound.. The extruded insulation screen
is normally free strippable(easy removable) type but can be
provided with bonded one upon request. The metallic part is
normally applied on the individual cores for rated voltage above
1.8/3kV and on the core assembly for rated voltage
1.8/3kV and consists of plain annealed copper tape. or copper
tape screen a layer of copper wire,a lead alloy or corrugated
aluminum sheath can be provided upon request. 5) Inner
Covering or Separation Sheath(for armored cables)A layer of PVC
inner coveing is applied under the armor ,if there is no
screen.When the metallic screening and the armor are of
different metals, an extruded separation sheath of PVC is provided
in order to separate the different metals.6) Metallic ArmorThe
armor, if required, consists of single layer of round wires or
double tapes of galvanized steel or aluminum or other non-magnetic
metals. Single core cables are normally armored with aluminum(other
non-magnetic metals), because non-magnetic armor is essential
for single core cable for use on A.C circuit .7) Outer SheathAll
cable are normally provided with an extruded PVC out sheath, black
colored(class ST2). Other materials can be available upon
request,as PE , polyethylene,high flame or fire retardant PVC and
etc.8) Core Identification The multiple conductors are
identified as according IEC60502 . Cable
Marking(Customized) The following information are indicated on
the surface of the outer sheath. However, the marking can also be
customized. ----voltage rating, area for cable----manufacturer's
name----year of manufacturer----lengther for cable----etc3.Typical
Drawing4. TestsThe finished cables meet all the appropriate test
requirments specified in IEC60502. 5.Packing Our workshop/*
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